Sodium Laureth Sulfate (SLS) is an ingredient derived from ethoxylated lauryl alcohol and used as a surfactant; may be contaminated with potentially toxic manufacturing impurities such as 1,4-dioxane.
Virtually every toothpaste that foams, has SLS. But researchers discovered a problem. According to Dr Toby Talbot, an expert in restorative dentistry and a member of the Royal College of Surgeons, Sodium Lauryl Sulphate (SLS), is used as a wetting agent (something that allows the paste to spread more easily), is a major concern for good dental health. "The problem with SLS is that it opens up the gaps between the mucosal – skin – cells in the mouth, which allows toxins or carcinogens to get in (these can come from all manner of sources including tobacco smoke), he said.
So next time you buy a toothpaste, THINK!